Fractal Audio Axe-Fx III, Руководство пользователя

Страница: 111 / 151

105
9 MODIFIERS
INTERNAL CONTROLLERS
LFO1 + LFO2
An LFO, or Low Frequency Oscillator,
generates control signals in the form of a
variety of familiar wave shapes ( p. 135 ). Familiar
examples of LFOs in action include the pulse of
a tremolo, the steady back and forth sweep of a
phaser, or the classic “Ship Ahoy” OB filter.
Type sets the waveform or shape. You can set a
Rate or lock the LFO to the current tempo. You can
vary the overall Depth and Duty, or symmetry.
Each LFO outputs two signals, “A” and “B” and so
appears twice in the list of sources. You can change
the Out B Phase.
The Run parameter starts and stops the LFO. This
can be used to keep it from drifting over time.
Quantize changes smooth waveforms into
segmented ones. Try it on the “TRI” waveform for a
“stepped” effect.
TEMPO
SEQUENCER
The Axe-Fx III Step-Sequencer generates
control patterns by looping through 2–32
“stages.” You set the Value for each stage, the
Number of stages, and the Rate or Tempo. The Run
switch allows you to start or stop the sequence.
SCENE CONTROLLERS
The four Scene Controllers provide a way
to change sound settings from one Scene
to another. Think of each Scene Controller
as a “virtual knob” whose setting can programmed
with a different value in every Scene. By assigning
this knob as a modifier source, you can create “per-
scene” parameters.
For example, you might assign Scene Controller 1 to
Input Drive in the Amp block with a value of 10% in
Scene 1, 50% in Scene 2, 75% in Scene 3, and so on.
As with any source, a scene controller can be
assigned to multiple parameters at the same time,
each with its own modifier settings.
A Scene Controllers tutorial appears on
p. 107 .
For more on Scenes, see Section 6 on p. 42 .
PITCH DETECTOR
The Pitch Detector analyzes the pitch of
your playing and outputs a low value for
low notes and a high value for high notes.
ADSR1 + ADSR2
The two ADSR sources are envelope
generators with Attack, Decay, Sustain
and Release parameters (thus “ADSR”). The ADSR
is triggered whenever the signal level exceeds its
Threshold measured at the input. The envelope
has three self-explanatory modes (Once, Loop, and
Sustain) and can optionally be set to Retrigger every
time the threshold is exceeded.
In comparison to the Envelope Follower, the ADSR
envelope generator always creates the same control
signal, but only triggers when you play hard enough.
ENVELOPE FOLLOWER
The Envelope Follower converts input level
to a control signal, responding variably
to your playing dynamics. The classic example is a
touch-wah, where the frequency of the wah varies
based on how hard you play. You can set Attack
and Release times independently, set the trigger
Threshold, and adjust the Gain at the trigger signal
input.
Internal Controllers can be programmed per-preset for use as modifier sources. To access these parameters,
push the CONTROLLERS button on the Home page (Push-knob
D
) or press TEMPO.
Tempo appears in the Controllers menu. For more information, see Section 10: Tempo
The Internal Controllers menu offers four channels for four sets of independent settings for ALL of
the items listed above: four tempos per preset, four sequencer settings, etc. When you change the
channel, ALL of the controllers switch to the new channel and the new settings. Axe-Edit III provides
a way to copy/paste Controller channels.